Aqueous dispersions of amino-functionalized organopolysiloxanes pre-crosslinked with oxalatopolyethers

Abstract

An aqueous dispersion includes precrosslinked organopolysiloxanes, emulsifiers, and water. The precrosslinked organopolysiloxanes include units of the formula R2SiO2/2 (I), and on average at least one structural unit of the formula SiR1O2/2—Y—SiR1O2/2 (III) where Y is a divalent radical of the formula —R2—[NR3—R4—]nNR3—C(O)—C(O)—NR3—Z—NR3—C(O)—C(O)—NR3—[R4—NR3—]nR2—.

The invention claimed is: 
     
         1 . An aqueous dispersion comprising
 (1) precrosslinked organopolysiloxanes which comprise units of the formula
   R 2 SiO 2/2   (I),
 
   and on average at least one structural unit of the formula
   SiR 1 O 2/2 —Y—SiR 1 O 2/2   (III)
 
   where   Y is a divalent radical of the formula
   —R 2 —[NR 3 —R 4 -] n NR 3 ·C(O)—C(O)—NR 3 —Z—NR 3 —C(O)—C(O)—NR 3 —[R 4 —NR 3 —],R 2 —
 
   Z is identical or different and is a divalent organic radical containing a polyoxyalkylene group,   R may be identical or different and is a monovalent, unsubstituted or substituted, saturated or unsaturated hydrocarbon radical having 1 to 18 carbon atoms,   R 1  may be identical or different and is a radical R or a radical-O—R 7 ,   R 2  is an SiC-bonded, divalent linear or branched hydrocarbon radical having 1 to 18 carbon atoms,   R 3  is a hydrogen atom, an alkyl radical having 1 to 8 carbon atoms or an acyl radical,   R 4  is a divalent hydrocarbon radical having 1 to 6 carbon atoms,   R 5  is identical or different and is a C 1 -C 10  alkylene radical,   R 6  is a C 1 -C 10  alkylene radical,   R 7  may be identical or different and is hydrogen or a monovalent hydrocarbon radical which has 1 to 18 carbon atoms and may be interrupted by one or more separate oxygen atoms,   n is 0, 1, 2, 3 or 4 and   m is an integer and is on average 1 to 80,   (2) emulsifiers,   and   (3) water.   
     
     
         2 . The aqueous dispersion as claimed in  claim 1 , wherein the precrosslinked organopolysiloxanes (1) comprise structural units of the formula
   R 1 ASiO 2/2   (II)
   where   A may be identical or different and is a radical of the formula
   —R 2 —[NR 3 —R 4 -] n NR 3   2  
 
   where   R may be identical or different and is a monovalent, unsubstituted or substituted, saturated or unsaturated hydrocarbon radical having 1 to 18 carbon atoms,   R 1  may be identical or different and is a radical R or a radical —O—R 7 ,   R 2  is an SiC-bonded, divalent linear or branched hydrocarbon radical having 1 to 18 carbon atoms,   R 3  is a hydrogen atom, an alkyl radical having 1 to 8 carbon atoms or an acyl radical,   R 4  is a divalent hydrocarbon radical having 1 to 6 carbon atoms, and   n is 0, 1, 2, 3 or 4.   
     
     
         3 . The aqueous dispersion as claimed in  claim 1 , wherein the precrosslinked organopolysiloxanes (1) are selected from the group of the formulae 
       
         
           
           
               
               
           
         
         and mixtures thereof, 
         where 
         R may be identical or different and is a monovalent, unsubstituted or substituted, saturated or unsaturated hydrocarbon radical having 1 to 18 carbon atoms, 
         Y is a divalent radical of the formula
   —R 2 —[NR 3 —R 4 —] n NR 3 —C(O)—C(O)—NR 3 —Z—NR 3 —C(O)—C(O)—NR 3 —[R 4 —NR 3 —] n R 2 —
 
 
         Z is identical or different and is a divalent organic radical containing a polyoxyalkylene group, 
         R 2  is an SiC-bonded, divalent linear or branched hydrocarbon radical having 1 to 18 carbon atoms, 
         R 3  is a hydrogen atom, an alkyl radical having 1 to 8 carbon atoms or an acyl radical, 
         R 4  is a divalent hydrocarbon radical having 1 to 6 carbon atoms, 
         R 7  may be identical or different and is hydrogen or a monovalent hydrocarbon radical which has 1 to 18 carbon atoms and may be interrupted by one or more separate oxygen atoms, 
         A may be identical or different and is a radical of the formula
   —R 2 —[NR 3 —R 4 —] n NR 3   2 ,
 
 
         e is 0 or 1, 
         j is 0 or an integer between 1 and 15, 
         k is at least 1 and at most 15, and 
         l is at least 40 and at most 1000. 
       
     
     
         4 . The aqueous dispersion as claimed in  claim 1 , characterized in that following the removal of the water, the precrosslinked organopolysiloxanes form elastomeric films. 
     
     
         5 . A precrosslinked organopolysiloxane (1) which comprises units of the formula
   R 2 SiO 2/2   (I),
   and on average at least one structural unit of the formula
   SiR 1 O 2/2 —Y—SiR 1 O 2/2   (III)
 
   where   Y is a divalent radical of the formula
   —R 2 —[NR 3 —R 4 —] n NR 3 ·C(O)—C(O)—NR 3 —Z—NR 3 —C(O)—C(O)—NR 3 —[R 4 —NR 3 —] n R 2 —
 
   Z is identical or different and is a divalent organic radical containing a polyoxyalkylene group,   R may be identical or different and is a monovalent, unsubstituted or substituted, saturated or unsaturated hydrocarbon radical having 1 to 18 carbon atoms,   R 1  may be identical or different and is a radical R or a radical —O—R 7 ,   R 2  is an SiC-bonded, divalent linear or branched hydrocarbon radical having 3 to 18 carbon atoms,   R 3  is a hydrogen atom, an alkyl radical having 1 to 8 carbon atoms or an acyl radical,   R 4  is a divalent hydrocarbon radical having 1 to 6 carbon atoms,   R 5  is identical or different and is a C 1 -C 10  alkylene radical,   R 6  is a C 1 -C 10  alkylene radical,   R 7  may be identical or different and is hydrogen or a monovalent hydrocarbon radical which has 1 to 18 carbon atoms and may be interrupted by one or more separate oxygen atoms,   n is 0, 1, 2, 3 or 4, and   m is an integer and is on average 1 to 80.   
     
     
         6 . A process for producing the aqueous dispersions of precrosslinked organopolysiloxanes (1), wherein organopolysiloxanes (4) which comprise units of the formula
   R 2 SiO 2/2   (I),
   and on average at least one structural unit of the formula
   R 1 ASiO 2/2   (II)
 
   where   R may be identical or different and is a monovalent, unsubstituted or substituted, saturated or unsaturated hydrocarbon radical having 1 to 18 carbon atoms,   R 1  may be identical or different and is a radical R or a radical —O—R 7 ,   A may be identical or different and is a radical of the formula
   —R 2 —[NR 3 —R 4 —] n NR 3   2 ,
 
   R 2  is an SiC-bonded, divalent linear or branched hydrocarbon radical having 1 to 18 carbon atoms,   R 3  is a hydrogen atom, an alkyl radical having 1 to 8 carbon atoms or an acyl radical,   R 4  is a divalent hydrocarbon radical having 1 to 6 carbon atoms,   R 7  may be identical or different and is hydrogen or a monovalent hydrocarbon radical which has 1 to 18 carbon atoms and may be interrupted by one or more separate oxygen atoms, and   n is 0, 1, 2, 3 or 4,   are reacted with oxalamidoester-terminated polyethers (5) of the formula (V)   
       
         
           
           
               
               
           
         
         where 
         Z is identical or different and is a divalent organic radical containing a polyoxyalkylene group, and 
         R 8  is identical or different and is a monovalent hydrocarbon radical which has 1 to 18 carbon atoms and may be interrupted by one or more separate oxygen atoms, in the presence of emulsifiers (2) and water (3). 
       
     
     
         7 . The process as claimed in  claim 6 , wherein organopolysiloxanes (4) used comprise those selected from the group of the formulae
   [ARSiO 2/2 ] j [R 2 SiO 2/2 ] l [R 3-e (OR 7 ) e SiO 1/2 ] 2   (VIa),
     [A(OR 1 )SiO 2/2 ] j [R 2 SiO 2/2 ] l  [R 3-e (OR 7 ) e SiO 1/2 ] 2   (VIb),
   and mixtures thereof,   where   R may be identical or different and is a monovalent, unsubstituted or substituted, saturated or unsaturated hydrocarbon radical having 1 to 18 carbon atoms,   R 1  may be identical or different and is a radical R or a radical —O—R 7 , A may be identical or different and is a radical of the formula
   —R 2 —[NR 3 —R 4 —] n NR 3   2 ,
 
   R 2  is an SiC-bonded, divalent linear or branched hydrocarbon radical having 1 to 18 carbon atoms,   R 3  is a hydrogen atom, an alkyl radical having 1 to 8 carbon atoms or an acyl radical,   R 4  is a divalent hydrocarbon radical having 1 to 6 carbon atoms,   R 7  may be identical or different and is hydrogen or a monovalent hydrocarbon radical which has 1 to 18 carbon atoms and may be interrupted by one or more separate oxygen atoms, and   n is 0, 1, 2, 3 or 4,   are reacted with oxalamidoester-terminated polyethers (5) of the formula (V)   e is 0 or 1,   j is 0 or an integer between 1 and 15, and   l is at least 40 and at most 1000.   
     
     
         8 . A composition for treating substrates comprising the aqueous dispersions of  claim 1 . 
     
     
         9 . The composition as claimed in  claim 8 , wherein the substrates are fibrous. 
     
     
         10 . The composition as claimed in  claim 9 , characterized in that the fibrous substrates are textiles. 
     
     
         11 . A composition for treating substrates, comprising the aqueous dispersions of precrosslinked organopolysiloxanes of  claim 5 . 
     
     
         12 . A composition for treating substrates, comprising the aqueous dispersions produced as claimed in  claim 6 .